| A | B |
|---|
| Infiltration | the process of water sinking into the ground to become groundwater |
| porosity | the amount of pore space in a material |
| Zone of Saturation | The depth below the surface where groundwater fills all of the pores in a material |
| water table | the upper boundary of the zone of saturation |
| permeability | the ability of water to pass through a material |
| aquifer | permeable layers where groundwater flow takes place |
| spring | where ground water comes to the surface |
| hot spring | unusually hot ground water, which is heated by Earth's mantle |
| geyser | exploding hot springs |
| well | a hole dug through soil to tap into an aquifer to reach groundwater |
| drawdown | the difference between the watertable of a pumped well and a non-pumped well |
| recharge | the natural refilling of an aquifer |
| artesian well | occurs when an aquifer is under pressure |
